SI88440EC-ASR

Overview

The SI88440EC-ASR is a unidirectional digital isolator from the Si88440 series, manufactured by Skyworks Solutions. It features four independent channels with a data rate of 100 Mb/s and an isolation voltage of 5000 Vrms. The device operates within a supply voltage range of 3 V to 5.5 V and exhibits a propagation delay of 18 ns. It utilizes SOIC-20 packaging in a reel format, supporting operation temperatures from -40°C to +125°C.

Feature Summary

• Provides four-channel unidirectional signal isolation for general-purpose applications
• Utilizes capacitive coupling technology for high reliability and low power consumption
• Supports high common-mode transient immunity to ensure signal integrity in noisy environments

Applications

• Industrial automation systems requiring galvanic isolation
• Medical equipment needing safe signal transmission across isolation barriers
• Power electronics interfaces for monitoring and control circuits

Procurement Notes

Verify the specific suffix ASR indicates reel packaging when sourcing components. Confirm that the 5000 Vrms isolation rating aligns with your system safety requirements. Ensure compatibility with the SOIC-20 footprint during PCB layout. Check for moisture sensitivity level compliance if storage conditions are not controlled. Validate that the unidirectional polarity matches your circuit design directionality.

Selection Notes

Select this component when four isolated channels are required in a compact form factor. Consider the 100 Mb/s data rate for moderate-speed communication needs. Evaluate the 5000 Vrms isolation strength against regulatory standards. Compare power consumption metrics if battery operation is critical. Ensure the operating temperature range meets environmental constraints.

Part Context

This part belongs to the Si88440 family of ultra-low-power digital isolators. It shares core architectural features with other variants in the series but differs in packaging and channel configuration. The EC-ASR designation specifies the electrical characteristics and tape-and-reel delivery method.

Replacement Considerations

Direct substitutes include SI88440ED-ASR which offers identical electrical specifications but may differ in manufacturing lot or minor packaging tolerances. Verify pinout compatibility before substitution.